Don't get me wrong if I where doing an art that included striking I would totally wear one 100% of the time while training.
Also to the dads out their ever notice the knack your offspring have accidentally hitting your junk?

I train with butt floppers now but the point is certainly true I have been hit in the nuts doing Judo more then a few times but nothing serious.
Of course I also Paint balled for like 2 years without a cup.
After a couple of close calls I decided hey maybe its time to start wearing a cup, funny thing the 1st time out with a cup I got my junk light up by an Over Chrononed d'bag at close range. I think from then on I always had one on when we went. Never did get shot in the nuts again though.
I suppose I should go and buy a freaking cup & a mouth guard too I guess.
So any suggestions of a good cup for BJJ?